WTF!! Lipo fail.

[inferno]

The 10s wont stick a constant 2A charge in and will tail off probably 50-70% through that charge cycle.

Set the charger to 1C to be safe id say, defo look to getting a replacement, or even 2 to be safe

[Ashley Davis]

An Outrage G5 only pulls around 25A maximum during a full 3D flight, so you would be nowhere near over amping one of these packs (assuming all is well with the ESC and motor). Hovering is only around 8A. It is possible the ESC failed and shorted the pack, can you see any physical damage on the ESC..... a smell test normally highlights any burnt-out components.

[Triplexbee]

You know what they say about assumptions.

So should I try sticking the pack with the unbalanced 6th cell back on @1C or just ask Blink to exchange them both?

Matt.

[Triplexbee]

Esc checks out ok. No obvious hospital smell

[richieclarkie]

If it were me I would send the pack that has gone wrong back to Blink and try the other one. It's very unlikely you will have two duff packs.

If you want to be safe just spool the heli up and leave it running on the floor for 3 or 4 mins and recharge. Checking the voltage of all of the cells when you do this.

Also, remember you should not run the pack down to any more than 80% of the total capacity which means you should not be putting more than 1040 mah back in. If you fly for too long you can ruin your packs very quickly. I'm sure Ash could let you know how long to expect to hover for.

As long as you are careful you should be able to avoid any further problems.

[cjcj1949]

Lipo fail

Thanks to Ashley for some measurements and results from other people. If the dodgy cell is that far out you'll have difficulty recharging it. I'm glad I was too pessimistic about your current drain. Just a thought, you did use a balanced charge on the first battery I hope. Charging a pack that's badly balanced would be very hairy (on an unbalanced charge) as you would overcharge the good cells. A 0.4 volt difference is very high. If you are going to return one pack I'd return them both. £40 is a lot for a dodgy battery. You could recharge the low cell on it's own, but there must be a reason why it's low and it could come back to bite you in the future. I'm yet to see a dodgy cell get better permanently.

[moyesboy]

With the cellpro charger I would be suprised if charging had caused this issue.

Set the cellpro to auto 1C (or even 0.8 or 0.5C for now). Then charge the pack. The cellpro will sort out the 0.4V imbalance (which I agree is a bit high). If the imbalance is too high then the cellpro will warn you and might try some sort of saefety charge mode - it would be more of a problem on a less intelligent charger. You can talk about this to Rupert and maybe you can warn him that if it doesn't appear good after, say, 10 cycles it'll be returned like the other one which is definitely duff.

The safe charge level for good pack life is 1C, ie 1.5A on a 1500mAh pack, 1.3A on a 1300mAh pack etc.
People do charge packs at 1.5 or 2C at the field and accept a sorted cycle life to get flying quicker again at the field. The cellpro is about the best charger to do that sort of thing with.

First 10 cycles you should break the pack in with gentle hovering about and only run it down to 50%. I suggest 5 mins flight.
After 10 cycles yuo can extend the flight to the 80% limit. ie when you plug your pak to the cellpro it should read 20% left and only put back 80% of the packs capacity.

[inferno]

the cellpros fuel reading isnt accurate untill about 10 mins into the charge, always use it as a rough idea, i often plugged in to 9% fuel but put less than 80% into the packs Just keep eyes on mah put back in

[Ashley Davis]

I've seen out of balance packs come into balance during the first few charges. This is known as 'pack forming' and it ONLY happens in the first few charges. However, the description at the start of this thread talks about a sudden failure and puffing of the pack, so I would be inclined to just contact Blink regarding it and discuss an exchange.

[moyesboy]

the cellpros fuel reading isnt accurate untill about 10 mins into the charge, always use it as a rough idea, i often plugged in to 9% fuel but put less than 80% into the packs Just keep eyes on mah put back in

On occasion I have run my lipos down till my on board lipo alarm triggered, and then on the cellpro it read about 5%, but it still only put 1700 back into the 2100. So I guess I am being really quite kind to my lipos

Ash, he has one pack with a puffed cell, and another that is showing an imbalance of 0.4V on one cell.

[Triplexbee]

Update: I took richieclarkies advice and spooled up on the ground for 3.5mins.

Put the pack on the RCE-MT8 and these are my readings:

Total: 23.158V CP:!76
1:4.082v
2:4.084V
3:4.087V
4:4.084V
5:4.079V
6:2.730V

Put the pack on the charger set to 0.5A, scrolled through the menu to view cell voltages. 1-5 display about the same as the MT8 but there is no data for cell 6.

Is this normal? I am in despair here

Matt.

[Ashley Davis]

no it isn't normal, so you have one pack with 0V on one cell and one pack showing a cell (cell 6) way out of balance?
If that is the case just get both replaced, however, I'd expect a level of suspicion from the supplier as two dodgy packs in a row sold to the same person doesn't look good. Not saying you did anything wrong it's just unusual as these packs (6S 1300s) have a pretty good track record so far (ie. everyone with a G5 is using them and there's little if any reported issues both here and in the USA). You may just be very very unlucky

[Triplexbee]

Thats right, the bloated pack only shows 5c on the MT8 and the c6 on the other one is as mentioned in my previous post.

Does that give you any more ideas as to what has happened Ash?

[Ashley Davis]

no, I updated my previous post by the way with a little more info.

Bottom line you need two new packs. Time to call Rupert and explain what's happened, I did have to talk to him earlier today (different subject, about the Outrage 550) so he is already aware of the issues you are having with the packs.

[Smoothound]

Mate of mine has got an Outrage and was getting near finishing it, connected up a pack, spooled it up and somehow it toasted his Jazz ESC so he's now using a T-Rex500 ESC until he gets a verdict on his Jazz...



I have 3 Outrage packs and one is deffo weaker than the others but it does seem to be catching up a bit now it's got a few more charges on it.